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Parametric modelling of nonstationary platform deck motions

DRS at CSIR-National Institute of Oceanography

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Title Parametric modelling of nonstationary platform deck motions
 
Creator Mandal, S.
 
Subject models
offshore
dynamics
modelling
entropy
 
Description Univariate system identification models are, in general, developed based on teh assumption that offshore dynamic systems are stationary random processes. For nonstationary processes, a method is adopted to transform the time series into wide-sense-stationary processes. Then the time series are modelled by the maximum entropy method which is formulated here for spectral estimation of platform deck displacements. The lower order maximum entropy spectra of nonstationary platform deck displacements are compared with fast Fourier transform spectra and show good agreement. However, the higher order maximum entropy model can be used for better representation of nonstationary motions. This method also reduces long time series of nonstationary offshore data into a few values which are teh coefficients of the maximum entropy model.
 
Date 2009-01-12T09:29:32Z
2009-01-12T09:29:32Z
1997
 
Type Conference Article
 
Identifier Proceedings of the Second Indian National Conference on Harbour and Ocean Engineering (Inchoe-97), Thiruvananthapuram, December 7-10, 1997. Vol. 1, 368-377p.
http://drs.nio.org/drs/handle/2264/2083
 
Language en
 
Rights Copyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Cent. for Earth Sci. Stud., Cochin (India)